Rotary spiral plow



Nov. 6, 1.928.

c. M. BRACK ROTARY SPIRAL PLOW Filed N'ov'. 12. 1927 2 Sheets-Sheet l I N VENTOR.

' ATToRv Ey.

Nov. s, 192s, 1,690,922

C. M. BRACK ROTARY SPIRAL PLOW 1927 2 Sheets-Sheet 2 I N VEN TOR. V cz/mmcn;

MAM-j 2 ATTORNEY.

Patented Nov. 6, k1928.y

UNITED STATES Application led November 12, 19.27. Serial No.y 232,887. v l

This invention relates to a rotary spiral plow and has for its object to' provide, in a manner as Vhereinafter set forth, a plow of such class including a ,rotatable cylinderl having one or more plow elements helically ydisposed throughout theY periphery thereof and with the plow share element constructed in a manner to provide for a thoroughly efficient working or cutting of the ground during the travel of the plow. p

A further object of the invention is to provide, in al manner as hereinafter set forth, a rotary plow including one or more helically disposed plow share elements, andv further including a combined reciprocatory kand oscillatory springcontrolled means intermit-V tently engaging with the plow share elements for cleaning them in a satisfactory manner during the travel of the plow.

Further objects of the invention are to provide, in a manner as'hereinafter set forth, a

. rotary plow lwhich is comparatively simple in its construction and arrangement, strong,

durable, compact, thoroughly eiiicient in its use, conveniently assembled, and comparatively inexpensive to set up.

vWith the foregoing and other objects in view the invention consists of the lnovel con- V struction, combination and arrangement of parts as hereinafter more'xspecifically described, and illustrated inthe accompanying drawings, wherein is shown an embodiment of the invention, but Vit is to be understood that changes, variations and modifica- A tions can be resorted to which fall within the scope of the claims hereunto appended.k

In the drawings wherein' like reference characters denote corresponding parts throughout the several Views: Y 40 Figure l is a top plan View of a rotary plow in accordance with this invention. Y

Figure 2 is al longitudinal sectional View of the cylinder carrying'the share element.

Figure 3 is a side elevation of the plow. Figure 4 is a fragmentary View in plan and upon an enlarged scale lshowing the arrangement of the cleaner device with respect to the share elements. ,l j

Figure 5 is a section on line 5 5 Figure 4. Figure 6 is a fragmentary view, in section, illustrating the lap joint between a pair/of plow share members or sections. A rotary plow, in accordance. with this invention, includes a horizontally disposed rectangular frame having the side bars thereof indicated at 1, 2,V the front bar at 3 PATENT oFF-ICE.

and the rear bar at 4. c The front bar 3 projects forwardll and is of arcuate shape. The front bar 3 is provided with a series of spaced-openings 5.for adjustably connecting a hitch thereto. centrally thereof withv an enlarged portion 5 Bassum i Each side bar isprovided formed .with a central transversely extend- Y ing openingr 6.Y The enlargedy portions 5 form bearingsl for a shaft 7 carrying stop collars 8 which are positioned` within the frame and arrest lengthwise shifting ofthe shaft 7, or in other words ythe collarsc8 act to maintain the shaft `7 inset position with respectto the frame.

Bodily carried with the shaft 7 is a *cyl-v inder or drum of appropriate diameter and of a length less than. the distance from one side bar to the other side bar of the `frame.

The cylinder rotates with the shaft "7' andy comprises a hollow bodyportion 9, closed at each end by a fianged head 10.` The flanges of the'heads 10 are indicated at 11, and holdfast devices 12 are employed forsecuring the heads 10 within thebody portion 9 atkthe ends thereof. Each head 10 is formed with an axial opening 13 for the passage of the shaft 7 and secured to the'outer face of each head 10, centrally thereof, is a flanged casting 14.`

The flange of the casting l14jis indicated at 14 and it is iixedly secured to a head vby the holdfast devicesV 15. Each` casting 14 is isters with an openin 13.- The Vcasting is fixedly secured` to the sgh cally extendingV rivet or pin 17 .i l v Disposed throughout the outer periphery of the body ,portion 9' is a plurality of helical formed with an axial opening 16V which regplow sliare elements, Ypreferably two and f indicated generally at 18. Each element18 aft by a diametriis formed of a series ofsharemenibers or sections 19 of like construction.

The members 'or'sections 19'of each element '18 have a lap joint connection thereA between, as shown in Figure 6.`The1opposed endsof said members or sections 19 are4 rabbeted as 'at 20, arranged in overlapping positions, an'ddetachably connected together by the hold-fast devicesf21,l Each share member orvsection 19 is of substan-v tially concavo-convex` transverse section.

See Figure 2. Each share member or section 19 1s detachably connectedy at itsinner side,

against the outer periphery of the cylinder, bythe holdfast devices 22. i f

Carried by the rear bar 4 ofthe 'frame and projecting forwardly therefrom is a comprises a. pair of spaced,

bined reciprocatory and oscillatory spring controlled means which is adapted to inten mitteiitly engage with the plow share elesection. Secure-d to and extended forwardly from the bar 23 isa series oit spaced cleaner members 2G for bearing against the plow share element or elements. rllhe bar 24 is slidably supported by a series et apertured, forwardly directed supporting members arranged in spaced relation, and iiXedly secured to the rear bar Ll ot the trame, by the holdiast .devicesv 28; r',lhe number oi snpporting members is three and carried by the bar 2e and bearing against the central snpporting member 28 is a coiled controlling spring 29, conned on the bar 2 between a collar 30 and-said central supporting ineinber. The spring 29 functions to maintain the bars 24 and cleaner' member 26 inthe position shown'in Figure l.y The bars Q55, "24e are shifted in the direction ot the arrow El, against the action oit the controlling spring 29, by the coils ot the plow share ele'- mentor elements.V The bar 2d is provided with a stud 32 which rides aoainst a camy piece 33 extending` forwardly from the rear bai` Ll ot the traine. The cam piece 33 `is secured to the rear bar l by the holdtast devices 254. The cani piece 34 includes an upstandiira1 arcuate pai-t 35 arranged forwardly ot' the bar l and provides ineansi'or moving the bars 23, 24in an'upward direction when' l Vsaid bars move in the direction o the arrow s 1 i ci, and alter the cleaner members 26 pass clear ot the coils of the plow share elem-ent or elements, the spring` 29 acts to restore the cleaning meansto normal position and the loweringy oi the bars 23, 2e. The reciprocatory movement ot the'cleaninp,` means is had through the medium ot the spring 29 and the 'cleaningr member dingconnectionf with the coils ot the plow share element. or elements and the oscillatory movement ot the cleaning means is had throng/h `the medium oit the pin 2.4L, cam 33 and springt/l5); The movement oi'V the cleaning` means inenemlirection, dering oscillatory movemenh'is caused by the pin 32 and cam piece 33 and the movement in the opposite direct-ionY is arrested byv gravity. rllie construction and arrangement ot the cleaning' devices provides for the intermittent engijagement thereof with the coils ot the plow share element or elements.

yided on i hereto.

ln i* iggure l one of the sectional plow share elements indicated at A and the other at B. lt is to be understood that a single plow sha-re element can be employed or as many as desired. When one plow share element is employed. the inclination ot the coils will be greater than ii' a plurality of plow share elements were employed.

The cleaningv members 26 operate in the grooves orined between the coils ot and are not in permanent engagement with the plow share elements, but are shifted to interinio ,ige 'therewith for the purpose ot' .n saine.. thought themany advantages `of a yent'on can be readily understood, and althfV i the preterred embodiment ot' the inition is illastrated and described, yet it .i be understood that changes in the de et construction can be had which will within the scope 'ot the invention as T I i claim is .A rotary plow coniprising'a rotatable plow, in accordance with this ini cynnder provided on its ieriphery withV Vhe ically arranged plow share sections` or concave-,convex cross section ari, ngedin spaced relation, .and la combined reciprocalili) tory Aand oscillatory cleaning ineens intcimitteilt i positioned betweenand eng-a ina with said sections for cleaning' the saine dini ing the rotation oft the cylinder.

8. il rotary plow comprising` a traine, a rotatable cylinderfcarried thereby and proV its periphery wit-li heli lly arranged plow sha-re sections oi" concayo- Conifer.; ciosssection, Vand a coinbinedrecip# rocstory and oscillatory cleaning'nieans carif d by the rear bar of said traine and in-p tei'niittently extendingI between said sectons 'lior cleaning` the flatterdniing; the rotation ,or the. cylinder. i i

l. nl rotary plow comprising a traine, a `rottable cylindercarried thereby and arranged therein, 'helically arranged plow `o the peri iery et said cylinder, Vot concave-convex cross eee-- tion andarranged in spaced relation, and combined reciprocatory and oscillatory cleaningineans ari'ied by the rear bar oit said 'traine and inteiiiiittently extendingl be tween said sections and cleaning the same during the rot-ation oi the cylinder.

ln testimony whereof, l aliii; my

signature CCNRADlVl.V BRAGK.

iis 

